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Department of Informatics Technische Universität München Informatik X: Rechnertechnik und Rechnerorganisation / Parallelrechnerarchitektur Prof. Dr. Arndt Bode , Prof. Dr. Hans Michael Gerndt |
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On this page, a few example images reconstructed from PET scan data can be seen. The left picture always shows the result of the conventional method, the filtered back projection. On the right side the result from the iterative method OSEM is shown. Currently, the latter method which produces pictures of far superior quality, cannot be used in clinical routine as the algorithm applied to construct them are too computationally intensive. This can be solved by utilizing cost-effective clusters for parallel processing as it is done within NEPHEW. As a result, high quality reconstruction of PET scans can be computed in short time and used in daily clinical routine.
Full body scan of a male patient with tumors in the lung area. The right picture shows more details including the arms and hands of the patient.
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Filtered back projection |
Iterative method (OSEM, 5 iterations / 4 blocks) |
Side view of the same patient. The right picture, in contrast to the blurred picture on the left, clearly shows the vertebrate.
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Filtered back projection |
Iterative method (OSEM, 5 iterations / 4 blocks) |
The following pictures show two different vertical slices through the patient's body. The upper snapshots are taken through the lung area (big white area) while the lower pictures show the area around the patient's heart (small V shaped structure). Again, the right pictures show more detail and do not exhibit any artifacts as they are introduced by the filtered back projection.
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Filtered back projection |
Iterative method (OSEM, 5 iterations / 4 blocks) |
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